• 한국항행학회논문지
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• 제11권3호
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• pp.319-328
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• 2007

본 논문에서는 고해상도 FPD(Flat Panel Display)에서 동영상의 화질 향상을 위한 콘트라스트 향상 알고리즘을 제안하고 이를 구현하였다. 또한 입력되는 영상신호의 밝기 분포에서 영상의 평균과 분산을 이용하여 적응적으로 처리하는 적응형 콘트라스트 제어 기법을 제안하였다. 설계된 Contrast Enhancer는 기존화면과 비교하여 정량적으로 측정하였으며, 실제 유용성을 검증하기 위해 30인치 TFT-LCD TV에 인터페이스하여 구현하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
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• pp.201-202
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• 2000

This seminar outlines the technology involved in the backlighting of TFT LCDs. It covers basic terminology, lighting requirements, lamp types and optical techniques. These will be reviewed and compared. Optical factors will be covered and related to space constraints. The spectral requirements, luminance levels, system efficacy, power requirements, lamp temperature, as well as other parameters affecting system performance will be discussed.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.311-314
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• 2003

Holographic diffuser(HD) layer was demonstrated to be located inside LC cell for a transmissive LCD of TFT-array on Color Filter structure. Master pattern of this layer was generated by holographic method and this pattern was replicated by the stamping of the master pattern on UV resin. Combined with a compensation film, TN-mode LCD with this layer showed improved viewing angle characteristics, especially along the up-down direction.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.456-458
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• 2002

On the half area of a pixel, pretilt angle was decreased by UV radiation and two domain TN was induced by the pretilt difference. In this structure, ITO slit was made inside pixel electrode on the TFT substrate to stabilize domain boundaries. The result shows that this structure is more resistant to outside stress and unwanted domain deformation is prevented.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.21-25
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• 2005

In order to implement high pixel density in AMLCDs, high aperture ratio is a very important design factor. We have implemented VGA panels with IPS and TN modes. IPS mode is a very attractive solution to meet the requirement for mobile phone displays. It provides much higher aperture ratio as well as wider viewing angle at extremely high pixel density over 400 ppi.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.42-45
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• 2002

Small sized LTPS TFT-LCDs are developed and evaluated. Sine the fabrication process is optimized for the productivity of huge glass substrate, the pattern size is above 5${\mu}m$. The panels with integrated digital data drivers are not satisfactory to compete with a-Si technology. Therefore, LTPS panels are implemented by PMOS technology and it is proved that they can be competitive with a-Si TFT-LCDs in terms of performance and cost.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.393-395
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• 2005

Super In Plane Switching (S-IPS) technology is applied for large TFT-LCD panels used in TV applications. It has a lot of advantages in comparison to the alternative, VA technology. S-IPS shows excellent viewing angle properties and fast response time between intermediate gray levels. If the performance parameters which describe the actual visual performance are considered, S-IPS is much more $advantageous.^{1)}$ However, it shows relatively low contrast ratio in diagonal direction compared to viewing angle characteristic in upper/down direction in S-IPS. In order to compensate the relatively low diagonal contrast ratio, Super-IPS applying for optical film developed, but Super-IPS still has the problem of color shift in black $pattern.^{2)}$ So we improved this problem by developing Enhanced Super-IPS.

• 소성∙가공
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• 제14권3호
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• pp.282-290
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• 2005

Nowadays, TFT-LCD is widely used as display unit of many digital devices. And, the backlight unit(BLU) is used as a light source of TFT-LCD module. In the backlight unit, the most important component is a light guide, which guides the input light to the TFT-LCD module uniformly. Recently, many researchers have focused on improving the efficiency of BLU by changing the design and structure of a light guide. In the present paper, a series of simulation was performed to find the optimal luminance distribution of emanated light from the given geometry as the first step. From the results of simulations for the light guide with given V-groove pattern, the emanated light from it is mostly affected by the groove angle. In the case of acute angle, about 74 degrees was found as optimal angle to satisfy the restrictions of angular luminance distribution, FWHM, the maximum luminance, etc. However, as far as the average luminance value was concerned, the case of 120 degrees(abtuse angle) was found to be the best while prism films were added to the BLU. As a next step the light guide samples of 74 and 120 degrees were manufactured by DSF method, which was recently proposed by the authors. Of course, most of design parameters were chosen by the aid of simulation results. Finally, the results of average luminance values were compared between the simulation and DSF molded samples.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.383-388
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• 2004

In this paper an alternative Active Matrix LCD technology is described with scalable, low cost processing. The Dual Select Diode AMLCD requires 60% lower capital investment in the array process than a-Si TFT arrays and results in 20% lower cost LCD modules. Development at several AMLCD manufacturers is in progress.

• 한국위성정보통신학회논문지
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• 제9권1호
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• pp.13-16
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• 2014

최근 TFT-LCD TV를 구동하는데 있어서 비발광소자인 LCD의 응답특성을 개선하기 위해서 많은 연구가 진행되고 있다. 특히 기존의 1 Frame 의 시간주기를 보다 작게 나누어 구동하는 방법에 대해서 많은 연구가 진행되고 있으며, 이 경우 화면을 구성하는 데이터의 양이 많이 소요됨과 동시에 드라이버 IC의 구동 속도가 문제가 되고 있다. 기존의 차동신호를 바탕으로 한 TFT-LCD 구동신호는 이러한 문제에 대응하는데 문제가 있으며, 본 연구에서는 Full HD를 Quad 쌍으로 구동하는 고속 구동을 위해서 기존의 신호전송방식이 가지고 있던 많은 입력선 수를 효과적으로 줄이기 위해서 직렬 데이터 전송방식의 Full HD Generator 를 제작하여 평가하는데 목적을 두었으며, 평가 결과 육안으로도 잔상이 없는 고속구동이 가능한 직렬 데이터 방식의 구동 설비를 제작할 수 있었다.